Inferior view of the frontal bone
| Term name | Layer | |
|---|---|---|
| 1 | Ethmoidal notch | Layer 1 |
| 2 | Nasal margin | Layer 1 |
| 3 | Frontal sinus | Layer 1 |
| 4 | Frontal notch; Frontal foramen | Layer 1 |
| 5 | Supra-orbital notch; Supra-orbital foramen | Layer 1 |
| 6 | Opening of frontal sinus | Layer 1 |
| 7 | Fossa for lacrimal gland; lacrimal fossa | Layer 1 |
| 8 | Orbital surface | Layer 1 |
| 9 | Orbital part | Layer 1 |
| 10 | Nasal spine | Layer 1 |
| 11 | Nasal part | Layer 1 |
| 12 | Zygomatic process | Layer 1 |
| 13 | Sphenofrontal suture | Layer 1 |
| 14 | Temporal surface | Layer 1 |
| 15 | Supra-orbital margin | Layer 1 |
| 16 | Glabella | Layer 1 |
| 17 | Superciliary arch | Layer 1 |